A Perth student who plotted with a friend to murder a teacher before trying to attack the victim with a knife in a meeting room at their school, has been sentenced to three years and one month in juvenile detention.
The girl, who cannot be identified, was 14 years old late last year when she and the 13-year-old friend used the social media app, Discord, to discuss how to kill the 55-year-old female teacher at Willetton Senior High School, in Perth's southern suburbs.
